Remove "CDN" from the model name, and change 'made for Canada' to 'built in Canada' to be consistent with the other two M152 entries.
https://www.imcdb.org/vehicle_441499-Dodge-M-152-CDN.html

Should be Dodge M43, not M34, that's a typo.
https://www.imcdb.org/vehicle_190982-Dodge-M-34.html
https://www.imcdb.org/vehicle_560018-Dodge-M-34.html

Should be Dodge M880-Series. The Dodge-built CUCV family of trucks was M880, M881, M882, and so on. There was no such thing as an M88 truck.
https://www.imcdb.org/vehicles.php?make=Dodge&model=M-88-Series

Same thing as above, M890-Series.
https://www.imcdb.org/vehicles.php?make=Dodge&model=M-89-Series

I know you said you're going to wait until you have a better way of renaming entries before you do them, so I'm just going to put these here for the future. More M-series vehicles to remove the dash from.
https://www.imcdb.org/vehicles.php?make=Dodge&model=M-152
https://www.imcdb.org/vehicles.php?make=Dodge&model=M-283
https://www.imcdb.org/vehicles.php?make=Dodge&model=M-37
https://www.imcdb.org/vehicles.php?make=Dodge&model=M-37+B1
https://www.imcdb.org/vehicles.php?make=Dodge&model=M-37+Cargo
https://www.imcdb.org/vehicles.php?make=Dodge&model=M-43
https://www.imcdb.org/vehicles.php?make=Dodge&model=M-601
https://www.imcdb.org/vehicles.php?make=Dodge&model=M-886